Vapefoward stout-anyone having battery issues?

So I bought a stout from enushi, and I' have tried a mnke and a awt. Both batteries give me the weak battery text after 15-20 hits. I'm only using a cleito at 55W. What really bugs me here, is the fact that using a 26650, i would get more battery life. But I can't even use the damm thing for more than a hour! Anyone having this issue?